单选题A: I have an appointment with Mr. Lee. B: Mr. Lee is expecting you now. ______

单选题What might driving on an automated highway be like? The answer depends on what kind of system is ultimately adopted. Two distinct types are on the drawing board. The first is a special-purpose lane system, in which certain lanes are reserved for automated vehicles. The second is a mixed traffic system: fully automated vehicles would share the road with partially automated or manual driven cars. A special-purpose 1ane system would require more extensive physical modifications to existing highways, but it promises the greatest gains in freeway (高速公路) capacity. Under either scheme, the driver would specify the desired destination, furnishing this information to a computer in the car at the beginning of the trip or perhaps just before reaching the automated highway. If a mixed traffic system way was in place, automated driving could begin whenever the driver was on suitably equipped roads. If special-purpose lanes were available, the car could enter them and join existing traffic in two different ways. One method would use a special onramp (入口引道). As the driver approached the point of entry for the highway, devices installed on the roadside would electronically check the vehicle to determine its destination and to ascertain that it had the proper automation equipment in good working order. Assuming it passed such tests, the driver would then be guided through a gate and toward an automated lane. In this case, the transition from manual to automated control would take place on the entrance ramp. An alternative technique could employ conventional lanes, which would be shared by automated and regular vehicles. The driver would steer onto the highway and move in normal fashion to a "transition" lane. The vehicle would then shift under computer control onto a lane reserved for automated traffic. [The limitation of these lanes to automated traffic would, presumably, be well respected, because all trespassers (非法进入者) could be swiftly identified by authorities. ] Either approach to joining a lane of automated traffic would harmonize the movement of newly entering vehicles with those already traveling. Automatic control here should allow for smooth merging without the usual uncertainties and potential for accidents. And once a vehicle had settled into automated travel, the driver would be free to release the wheel, open the morning paper or just relax.

单选题Do you think our, body's response with Cortisol is harmful to our health? Why? (This question is based on Passage 4)

单选题According to the context, the word "flamboyant" most likely means

单选题The phrase give... fresh blood (Liner1, Paragraph 5) most probably means ______. A．to transfuse blood B．to give new energy C．to add new staff D．both B and C

单选题I could have done it better if I______ more time.A. have hadB. hadC. had hadD. will have had

单选题To tell whether a sound is a vowel or not, we should judge its manners of articulation and the places of articulation.

单选题In the meantime, we hope that we shall be able to ______ this unfortunate discrepancy, as the transaction, as it stands at the moment, shows a considerable loss to us. A．iron out B．make out C．take out D．turn out

单选题The news______banks will charge higher interest comes out in today's TV report.

单选题It"s time we ______ lunch.

单选题He cleaned the car ______ had an accident.

单选题The drunk man was running from side to side in the crowd and he knocked into ______. A. one person after another B. one by one C. a man and woman D. persons after persons

单选题At some point during their education, biology students are told about a conversation in a pub that took place over 50 years ago. J. B. S. Haldane, a British geneticist, was asked whether he would lay down his life for his country. After doing a quick calculation on the back of a napkin, he said he would do so for two brothers or eight cousins. In other words, he would die to protect the equivalent of his genetic contribution to the next generation. The theory of kin selection—the idea that animals can pass on their genes by helping their close relatives—is biology's explanation for seemingly altruistic acts. An individual carrying genes that promote altruism might be expected to die younger than one with "selfish" genes, and thus to have a reduced contribution to the next generation's genetic pool. But if the same individual acts altruistically to protect its relatives, genes for altruistic behavior might nevertheless propagate. Acts of apparent altruism to non-relatives can also be explained away, in what has become a cottage industry within biology. An animal might care for the offspring of another that it is unrelated to because it hopes to obtain the same benefits for itself later on (a phenomenon known as reciprocal altruism). The hunter who generously shares his spoils with others may be doing so in order to signal his superior status to females, and ultimately boost his breeding success. These apparently selfless acts are therefore disguised acts of selfinterest. All of these examples fit economists' arguments that Homo sapiens is also Homo economicus—maximizing something that economists call utility, and biologists fitness. But there is a residuum of human activity that defies such explanations: people contribute to charities for the homeless, return lost wallets, do voluntary work and tip waiters in restaurants to which they do not plan to return. Both economic rationalism and natural selection offer few explanations for such random acts of kindness. Nor can they easily explain the opposite: spiteful behavior, when someone harms his own interest in order to damage that of another. But people are now trying to find answers. When a new phenomenon is recognized by science, a name always helps. In a paper in Human Nature, Dr Fehr and his colleagues argue for a behavioral propensity they call "strong reciprocity". This name is intended to distinguish it from reciprocal altruism. According to Dr Fehr, a person is a strong reciprocator if he is willing to sacrifice resources to be kind to those who are being kind, and to punish those who are being unkind. Significantly, strong reciprocators will behave this way even if doing so provides no prospect of material rewards in the future.

单选题In his "Odyssey", Homer immortalized the idea of resisting temptation by having the protagonist tied to the mast of his ship, to hear yet not succumb to the beautiful, dangerous songs of the Sirens. Researchers have long been intrigued as to whether this ability to avoid, or defer, gratification is related to outcomes in life. The best-known test is the "marshmallow" experiment, in which children who could refrain from eating the confection for 15 minutes were given a second one. Children who could not wait tended to have lower incomes and poorer health as adults. New research suggests that kids who are unable to delay rewards are also more likely to become criminals later. Recently, four researchers used data from a Swedish survey in which more than 13,000 children aged 13 were asked whether they would prefer to receive $140 now or $1,400 in five years" time. About four-fifths of them said they were prepared to wait. Unlike previous researchers, the authors were able to track all the children and account for their parental background and cognitive ability. They found that the 13-year-olds who wanted the smaller sum of money at once were 32% more likely to be convicted of a crime during the next 18 years than those children who said they would rather wait for the bigger reward. Individuals who are impatient, they believe, prefer instant benefits and are therefore less likely to be deterred by potential punishments. But those who fret that a person"s criminal path is set already as a teenager should not despair. The four researchers offer a remedy. When the respondents" education was included in the analysis, they found that higher educational attainment was linked to a preference for delayed gratification. Educational attainment and patience are related either because patience helps students to do better or because schooling makes people more likely to postpone rewards. Fortunately, there is evidence in support of the latter theory. Francisco Perez-Arce of the RAND Corporation, a think-tank, interviewed around 2,000 applicants for Mexican universities. The students had similar credentials but some obtained admission through a lottery to a university that did not charge tuition fees, whereas the rest had to apply elsewhere. As a result, a higher proportion of lottery-winners than losers went to college. After a year, Mr. Perez-Arce found, the lottery-winners were more patient than the losers. Since the process was random, he concluded that higher education can make people place more weight on the future.

单选题She told her parents that she had decided to marry him, ______a prince or a pauper.

单选题Without a(n) liberal supply of necessary equipment and materials, the mountain-climbers would not have been able to scale the heights and reach the top in such bad weather.

单选题The word "laze" is an example of______in word formation.

单选题In 1990, " Pretty Woman" became a smash hit her natural gift for this type of comedy brought her a nomination for Best Actress.